hibernate的简单学习（第一天）

sql脚本：

-- Create table
drop table T_PERSON;
create table T_PERSON
(
  id         number(10) PRIMARY KEY,
  name       VARCHAR2(20),
  password   VARCHAR2(30),
  registtime DATE,
  userlevel  VARCHAR2(10),
  extend1    VARCHAR2(20),
  extend2    VARCHAR2(20),
  extend3    VARCHAR2(20)
)

hibernate.cfg.xml配置文件：

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

    <session-factory>
        <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>
        <property name="connection.username">icdwf</property>
        <property name="connection.password">icdwf</property>
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        
        <mapping resource="com/study/hibernate/domain/Person.hbm.xml"/>
    </session-factory>

</hibernate-configuration>

hibernate映射文件：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
    <!--
        Mapping file autogenerated by MyEclipse Persistence Tools
    -->
<hibernate-mapping >
    <class name="com.study.hibernate.domain" table="t_person">
        
        <id column="id" name="id" type="integer"> 
            <generator class="sequence">
                <param name="sequence">seq_person_id</param>
            </generator>
        </id>
        <!-- 
        <id column="id" name="id" type="integer"> 
            <generator class="native">
            </generator>
        </id>
        
        <id column="id" name="id" type="integer"> 
            <generator class="increment">
            </generator>
        </id>
         -->
        
        <property name="name" column="name" type="string"></property>
        <property name="password" column="password" type="string"></property>
        <property name="userLevel" column="userLevel" type="string"></property>
        <property name="registTime" column="registTime" type="date"></property>
        <property name="extend1" column="extend1" type="string"></property>
        <property name="extend2" column="extend2" type="string"></property>
        <property name="extend3" column="extend3" type="string"></property>
        <!--
            <set name="address" table="address"> <key column="personId"></key>
            <element column="address" type="string" length="50"></element> </set>
        -->
    </class>
</hibernate-mapping>

Person实体类：

package com.study.hibernate.domain;

import java.util.Date;

public class Person 
{
    private int id;
    private String name;
    private String password;
    private String userLevel;
    private Date registTime;
    private String extend1;
    private String extend2;
    private String extend3;
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getUserLevel() {
        return userLevel;
    }
    public void setUserLevel(String userLevel) {
        this.userLevel = userLevel;
    }
    public Date getRegistTime() {
        return registTime;
    }
    public void setRegistTime(Date registTime) {
        this.registTime = registTime;
    }
    public String getExtend1() {
        return extend1;
    }
    public void setExtend1(String extend1) {
        this.extend1 = extend1;
    }
    public String getExtend2() {
        return extend2;
    }
    public void setExtend2(String extend2) {
        this.extend2 = extend2;
    }
    public String getExtend3() {
        return extend3;
    }
    public void setExtend3(String extend3) {
        this.extend3 = extend3;
    }
    
}

HibernateSessionFactory获取Session的类：

package com.study.hibernate.util;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.SessionFactory;

/**
 * Configures and provides access to Hibernate sessions, tied to the
 * current thread of execution.  Follows the Thread Local Session
 * pattern, see {@link http://hibernate.org/42.html }.
 */
public class HibernateSessionFactory {

    /** 
     * Location of hibernate.cfg.xml file.
     * Location should be on the classpath as Hibernate uses  
     * #resourceAsStream style lookup for its configuration file. 
     * The default classpath location of the hibernate config file is 
     * in the default package. Use #setConfigFile() to update 
     * the location of the configuration file for the current session.   
     */
    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static Configuration configuration = new Configuration();    
    private static SessionFactory sessionFactory;
    private static String configFile = CONFIG_FILE_LOCATION;

    static {
        try {
            System.out.println("静态初始块");
            configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            System.err
                    .println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }
    private HibernateSessionFactory() {
    }
    
    /**
     * Returns the ThreadLocal Session instance.  Lazy initialize
     * the <code>SessionFactory</code> if needed.
     *
     *  @return Session
     *  @throws HibernateException
     */
    public static Session getSession() throws HibernateException {
        System.out.println("获取Session");
        Session session = (Session) threadLocal.get();

        if (session == null || !session.isOpen()) {
            if (sessionFactory == null) {
                rebuildSessionFactory();
            }
            session = (sessionFactory != null) ? sessionFactory.openSession()
                    : null;
            threadLocal.set(session);
        }

        return session;
    }

    /**
     *  Rebuild hibernate session factory
     *
     */
    public static void rebuildSessionFactory() {
        try {
            configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            System.err
                    .println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }

    /**
     *  Close the single hibernate session instance.
     *
     *  @throws HibernateException
     */
    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

    /**
     *  return session factory
     *
     */
    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    /**
     *  return session factory
     *
     *    session factory will be rebuilded in the next call
     */
    public static void setConfigFile(String configFile) {
        HibernateSessionFactory.configFile = configFile;
        sessionFactory = null;
    }

    /**
     *  return hibernate configuration
     *
     */
    public static Configuration getConfiguration() {
        return configuration;
    }

}

Test类：

package com.study.hibernate.text;

import java.util.Date;

import org.hibernate.Session;
import org.hibernate.Transaction;

import com.study.hibernate.domain.Person;
import com.study.hibernate.util.HibernateSessionFactory;

public class HibernateTest {
    
    public static void main(String[] args) {
        
        Session session = HibernateSessionFactory.getSession();
        System.out.println(session);
        Transaction transaction = session.beginTransaction();
        //transaction.begin();
        Person person = new Person();
        person.setName("Ljb");
        person.setPassword("456123");
        person.setRegistTime(new Date());
        person.setUserLevel("001");
        
        session.save(person);
        transaction.commit();
        HibernateSessionFactory.closeSession();
    }

}

运行结果失败，报下面的错：

%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/study/hibernate/domain/Person.hbm.xml
 at org.hibernate.cfg.Configuration.addResource(Configuration.java:616)
 at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1635)
 at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1603)
 at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1582)
 at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1556)
 at org.hibernate.cfg.Configuration.configure(Configuration.java:1476)
 at com.study.hibernate.util.HibernateSessionFactory.rebuildSessionFactory(HibernateSessionFactory.java:72)
 at com.study.hibernate.util.HibernateSessionFactory.getSession(HibernateSessionFactory.java:56)
 at com.study.hibernate.text.HibernateTest.main(HibernateTest.java:15)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from invalid mapping
 at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:549)
 at org.hibernate.cfg.Configuration.addResource(Configuration.java:613)
 ... 8 more
Caused by: org.xml.sax.SAXParseException: Document is invalid: no grammar found.
 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:236)
 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:172)
 at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:382)
 at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:316)
 at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:177)
 at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(XMLNSDocumentScannerImpl.java:779)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1794)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
 at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
 at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
 at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
 at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
 at org.dom4j.io.SAXReader.read(SAXReader.java:465)
 at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:546)
 ... 9 more

据说是*.hbm.xml文件里的：

<!DOCTYPE hibernate-mapping PUBLIC 
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

需要网络方可访问，我这网络的确有限制！